Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c0fec76b20c4dcc…

MALICIOUS

PDF

35.0 KB Created: 2020-11-02 03:29:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 74d5775978d805ab23bf438def612ca6 SHA-1: 5a1b213145499509a71a7b4bfc9b29c7ab0e438e SHA-256: 7c0fec76b20c4dcc990d255e2f97e1aa289cb4cd0c8289a8608985df96c8fa30
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.me/123?keyword=prismatic+black+diamond+wow In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f889bf3c8a4d.pdfIn PDF document text
    • https://tinalolovini.weebly.com/uploads/1/3/4/3/134371967/rixikesasurupawej.pdfIn PDF document text
    • https://nifufoji.weebly.com/uploads/1/3/4/4/134458522/jusadawajur.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/gevoderovepiru.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/sobipidixi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/3587/6517/files/nijevodepenaridad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8196/6779/files/44354912889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9481/1819/files/natalia_ginzburg_caro_michele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3776/7839/files/mini_cooper_bike_rack_prep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a197727-d239-48e8-88d1-c4680f24857a/69558717322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7482/5621/files/lifubav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e114a2c7-6ac0-48b2-97cf-cfb5f48b9a9a/6543775166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fb0f6e7-9d3e-4f0e-98e0-eb32ce8d4b0a/rubojemopugusowojupomis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edb5e7ed-4630-4241-b3fe-3bcca4befa7c/zadefidebobapewijizotofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9853/2757/files/riddles_with_answers_hard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15844b59-036f-4476-b66d-b2f3bfc37243/41442689874.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49EB 5384 bytes
SHA-256: 51de1c2d5f804fbb46509dc1d0d1a53206be49015029b8baf0d329ba28a577fc
font_01_sfnt_off00005c2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C2B 10244 bytes
SHA-256: ac3ed4e7abe9b274a7682f46db30988cb584c5cd21cc23071131c7597cff22b3

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